Aware and appreciative of a benefit; grateful.(adjective)
Expressive of gratitude: a thankful smile. (adjective)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "thankful" in a sentence
""I _am_ thankful for that," broke in Felix, "most _thankful_!"
"I remain thankful to so many across this state and nation for their words of encouragement and prayers during this difficult time."
"I am, in short, thankful for private-property markets that are the main driving force behind these and many other anti-pollutants -- a force so powerful that we today enjoy the incredible luxury of being able to worry, should we so choose, about very distant and very speculative forms of environmental problems such as species loss and global warming."